Chapter 8b/c Sealants/Wax

  1. Susceptible portions of the tooth are the
    pits and fissures on the occlusal surface
  2. The first step to sealant placement is to ______ the surface energy of the tooth by ______ which makes the enamel surface _______
    • raise
    • thoroughly cleaning and etching the enamel
    • more wettable
  3. Bond an ________ sealant into the pits and fissures
    unfilled or lightly filled resin
  4. the enamel etchant gel is ____% ______
    37% phosphoric acid
  5. What is the Armamentarium used for sealants
    • Curing Light
    • Etching gel with needle tube
    • Sealant with needle tube
    • Materials to isolate – cotton rolls, Dri-angle
    • Floss
    • Articulating Paper
    • Instrument kit (mirror, explorer)
  6. Clean surface of tooth or teeth to be sealed with
    • pumice slurry
    • prophy cup
    • and slow speed handpiece
  7. Allow the etchant to remain on the tooth surface for a minimum of
    fifteen seconds and a maximum of 60 seconds
  8. After rinsing thoroughly and then dry thoroughly the tooth should have a _______ appearance
    frosted white
  9. The sealant should be placed
    ONLY in the grooves
  10. Cure with the light for
    20 seconds (two beeps).
  11. after checking occlusion with _______ what steps should be taken?
    • articulating paper
    • run floss through teeth to remove excess sealant
    • Rinse (taste pretty bad)
  12. ______ demonstrating the lost wax technique for use in dentistry in 1907
    William H. Taggart
  13. When taking impressions you usually use an elastomeric material such as _______ and _______ then poured in _____
    • polyvinylsiloxane and polyether
    • die stone in a vacuum unit to minimize bubbles
  14. A die is a
    very accurate replica of the prepared tooth or teeth
  15. A die spacer is painted on to
    allow room for the crown to fit over the tooth and for the luting agent (cement
  16. "Wax-up” on the die will ______ and then be converted into ______
    • replicate the final restoration
    • metal, ceramic and metal, or all ceramic restorations
  17. ________, _______ and ________ must be finalized at the completion of the wax-up
    Margins, occlusion, and contours
  18. The sprue forms
    a channel through which the molten metal is cast
  19. Investment is a ________ product that can stand up very high heat and is _______
    • gypsum-like
    • poured around the wax entombing the pattern in the stone
  20. When the investment dries, the ring is then placed in an _______ leaving a _______
    • oven that burns away the wax
    • cavity (pattern) in the ring the exact shape of the restoration
  21. Explain the casting step
    Metal is melted with a torch and flung through the sprue channel into the space left behind by the melted wax
  22. What is done in the finishing and polishing step
    • Removing the sprue
    • Finish contours¢
    • Polish to high lustre
  23. What are some uses of waxes in dentistry
    • Patterns for castings
    • Help hold restorations while being repaired
    • Lute restorations together when soldering
    • Laboratory work
    • Denture fabrication
  24. What are pattern waxes and what are the types
    • The waxes that are used to create a likeness of the restoration to be cast in metal or ceramic, or processed into acrylic in the case of dentures
    • A. Inlay
    • B. Casting
    • C. Base Plate
  25. Inlay wax are used to create
    inlays, onlays, crowns, bridges, posts, implant abutments or any restoration to be cast in metal
  26. What is casting wax
    Preformed patterns for the creation of partial denture frame-works
  27. What is Base plate wax
    Versatile sheets of brittle wax that hold denture teeth when preparing a denture set up and provide a model of gingiva, soft tissue, and many other function
  28. What are processing waxes and what are the different types
    • Used in laboratory procedures to help fabricate or repair restorations
    • Boxing/Beading wax
    • Periphery wax
    • Sticky wax
  29. What is Boxing/Beading wax used for
    used on models when fabricating dentures
  30. What is periphery wax used for
    used on impression trays to add an area or help create the periphery of the impression
  31. What is sticky wax used for
    wax-used for luting together pieces when soldering, performing a repair, or mounting models on an articulator
  32. What types of waxes are theseImage Upload 1
    • A. boxing
    • B. periphery
    • C. sticky
  33. What are the two types of impression waxes
    • A. Adaptol
    • B.Bite Registration Wax
  34. What is adaptol used for
    Used to border mold a denture impression producing a clean clear impression of the mucobuccal fold
  35. Waxes are mostly replaced by ______
    elastomeric impression materials
  36. Waxes are a mixture of
    natural (beeswax/paraffin/ carnauba) and synthetic waxes
  37. When burned out in an oven, certain waxes leave _______ which is the key to the ______
    • no ash or residue
    • lost-wax technique
  38. Flow
    • The change in shape in response to applied force
    • At low temperatures, there is very little flow
  39. Thermal Expansion-
    Waxes expand greatly when heated-more so than any other material
  40. Residual Stress
    Stresses build up in the mass of wax as a result of handling – carving, heating, cooling
Card Set
Chapter 8b/c Sealants/Wax
Chapter 8b/c Sealants/Wax